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Super User

Re: Sigma Plot of smoother curves

Why don't you just reverse X and Y in your smoothing splines so don't have to use a solver?  That way you should be able to get the predicted values in the same manner I outlined.

-- Cameron Willden
Level III

Re: Sigma Plot of smoother curves

I have tried that but the fit I want is a reciprocal fit which is giving me a bad fit. This is the main reason why I want to use time vs voltage. Additionally, when running the experiement the voltage was set and teh time was measured. So the voltage measurements are discrete. I agree if I could have a voltage vs time fit (bottom graph) it would make my analysis easier. Maybe the fit I am using is wrong when I do a voltage vs time..



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